Adjustable fluid-tight packingless valve.



G. T. HUXPORD.

ADJUSTABLE FLUID TIGHT PACKINGLESS VALVE. APPLICATION FILED MAR. 12,1912.

1,069 067; Patented July 29, 1913.

WITNESSES. v I

UNITED STATES PATENT OFFICE.

GEOBGE'T. 'HUXFORD, or PROVIDENCE, RHODE ISLAND.

.ADJ'UST.ABLE FLUID-TIGHT PACKINGLESS VALVE.

Specification of Letters Patent.

Patented July 29, 1913.

Application filed March 12, 1912. Serial No. 683,359. v

ample, various types of testing-machines;

weighing machines; transmission dynamometers and other analogoushydraulic or pneumatic machines, the force or weight,

or the sudden impact of a blow is injst-antly transmitted to fluidconfined in the pressure chamber of the machine, said fluid pressurebeing transmitted therefrom by tubular connectlons to a suitablepressure-indicating gage. Asthus usually connected, the hand or pointerof the gage is liable to vibrate to a considerable extent before itbecomes steady enough to permit an accurate reading. Another objectionis that the joints are not oil-tight or leakless. This defect, 2'. e.fluid-leaking, is more apparent, however, in cases where manuallycontrolled reducing or throttling valves, or analogous devices, areemployed in connection with the pressure-chamber of the machine and thepressure-indicating gage, be-

.cause the escape or loss of even a very small amount of the volume ofthe fluid, as oil, used and normally fillingall the connected chambersand piping} renders the gage-reading more difficult and materially lessaccurate. j

The object I have in view is .to overcome, in a simple and inexpensivemanner,- the disadvantages and objections above referred to. To this endI have devised and produced an adjustable and self-contained oiltight orleakless valve device, adapted to I be interposed between saidfluid-charged chamber and a fluid pressure-gage, the said valve memberbeing .incontinuous direct open communication with both the saidpressure chamber and pressure indicating gage. I By means of myinvention, the same, when in use, operates to automatically interrupt orarrest the usual wave-like or pulsatory movements transmitted throughthe fluld to the pressure-indicatinggage. I

In the accompanying sheet of drawings,

Figure represents, inlenlarged scale, a longitudinal central sectionalview ,of a

packingless and fluid-tight pressure-equalizing valve, embodying myimprovements,

Fig. 2 is a horizontal sectional view of the same, taken on line 2-2 ofFig. 1;. and Fig. 3 1s a similar sectlonal view, in reduced scale,showing a slight modification.

The following is amore detailed description of my invention and themanner of its operation:

A, in the drawings, indicates the improved pressure-regulating valvedevice or attachment, complete. The main member B of the device has abody portion a- (which may bepolygonal) provided with a screwthreadedhead part a having a shallow, concentric recess d and raised centralface or seat a formed in its upper end, and having a relatively small,downwardly extending central hole 2', the latter terminating in alateral opening or nozzle a, whereby the device is adapted to bedetachably secured to a pipe or connection in open communication with asuitable pressure-indicating gage; said pipe and gage members beingomitted from the drawing. The body member B has also a small inlet hole0 extending upward into said recess (1 from the nozzle (1 the latteradapted to be detachably secured to the fluid-pressure chamber of atesting or other analogous machinethe latter not shown. An imperforate,.disklike, slightly, elastic diaphragm (Z, preferably of metal, restsfiatwise upon and is ormay be solderedto the upper outer annular face ofthehead a thereby, in connection 'with said recess 03, forming'anabsolutely fluid-tight auxiliary chamber when the device is properlyconnected to a pressure transmitting machine and gage. The nut b screwedto head a is bored to form a chamber c to receive a follower' f, thelatterv bein in -continuous engagement with the diap ragm positionedbelow it and forming a resistance or thrust-plate therefor. The underside of the follower, peripherally, is beveled or cut away, at f, topermitv a slight freedom of diaphragm movement at that point.

A- suitably headed screw 0, or thumb scre'w, as it may be termed, hasits lower or screw-threaded shank e fitted to the finely threaded upperportion of the correspondingly threaded inner, face of the wall of thechambered part c of the nut b. The bottom end of said shank is incontinuous engagement with a central raised lug f of the follower below.The head portion of screw 6 may be milled or'knurled peripherally andalso provided with a recess 6 in which an adjusting or stop-screw s ismounted, its lower end portion extending into the dry chamber 0 Betweenthe head of screw 0 and the upper face of nut- Z) is positioned .acheck-nut 0 fitting the finely threaded great-er degree of efficiency isobtained, be-

cause loss of fluid by leakage is wholly overcome, and the cost ofmanufacture lessened. I do not desire to limit my'invention to the scopeand application hereinbefore described, nor to the exact form andconstruction represented in the drawings, as changes or modificationsmay be made therein without departing from the spirit of the invention.I For example, in lieu of single apertures 0 and i for the flow offluid, two groups I of them may be employed, as indicated at 0 and 71Fig. 3, thereby providing for a larger volume of fluid. 1f desired, thefollower and diaphragm may be adjusted so as to throttle the fluid,thereby adapting the device to discharge or deliver fluid atcorrespondingly reduced pressure and volume.

This valve maybe successfully substituted in lieu of the usualradiator-valve, so-called, (in which a packed stern and valve proper areused)" thereby preventing leakage, etc. Obviously, the substitute valvein such case is adapted to be opened and closed by manipulating thescrew 0. Of course, the action of the valve device is substantially thesame in case the inlet and outlet nozzles a and a? are transposed.

I claim as my invention 1. As an improved article of manufacture, afluid-tight packingless valve device,

for accurately the latter.

the same consisting of a main body member having an interiorlyscrew-threaded chamber formed in its upper portion and independentintake and outletpassages extending longitudinally of the body andterminating in the base of said chamber, an endwise movable followermember supported in the chamber, a slightly elastic diaphragm interposedflatwise between the ends of said passages and the adjacent face of thefollower and forming a fluid-tight seal therebetween, a cap-screwfitting the screwthreaded portion of said chamber for limiting themovements of said diaphragm, and an annular check-nut fitting thescrewthreaded part of said cap-screw and at the same time bearing on theupper face of the said chambers walls.

2. In a valve device of the general character described, having a mainor body member provided with independent intake and outlet passages,both passages normally opening into a shallow annular reeess formed inthe upper end of said body member, and a diaphragm secured to the saidrecessed.end and forming therewith a fluid-tight chamber, thecombination therewith of a nut screwed to said body and seated upon theperipheralportion of the diaphragm, a manually controlled screw fittinga fine screw-thread formed in the said nut, a follower elementinterposed between and normally engageable with the inner end of thescrew andl'diaphr-agm, and means adjusting the position of the follower.

3. Ina valve device of the general character described, having a mainmember provided with independent intake and outlet passages extendingthrough its end, and a diaphragm fixedly superimposed on the latter andover said passages to form a fluid tight peripheral joint, .thecombination therewith of'a. bored collar member fixed to said mainmember, having a portion extending thereabove, amanually controlledfollower movably mounted in said collar, normally bearing against thediaphragm, and means for limiting the movements of In testimonywhereof'I have affixed my signature in presence of two witnesses.

GEORGE T. HUXFORD. Witnesses:

GEo. H. REMINGTON, CALVIN H. BROWN.

